WATCH: Dr. Jon LaPook Scrambles to Make His ‘CBS This Morning’ Live Shot

One of the most challenging parts of being an anchor is when you occasionally have to fill just a few more seconds of time, whether it is to get the program to a commercial or, in the case of “CBS This Morning” today… to a guest.

Look behind Charlie Rose in the video below, see CBS News medical contributor Dr. Jon LaPook scramble from the green room, realizing that he was supposed to be on-set. Listen to Rose start to speak verrrrry slooowwwlly, then watch as Norah O’Donnell steps in to fill the remaining few seconds before LaPook took his seat next to them.